package com.atguigu.ucenter.controller;

import com.atguigu.commonutils.JwtUtils;
import com.atguigu.ucenter.entity.Member;
import com.atguigu.ucenter.service.MemberService;
import com.atguigu.ucenter.utils.ConstantWxUtil;
import com.atguigu.ucenter.utils.HttpClientUtils;
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.net.URLEncoder;
import java.util.HashMap;

@CrossOrigin
@Controller  //只是请求地址，不需要返回数据
@RequestMapping("/api/ucenter/wx")
public class WxApiController {

    @Autowired
    private MemberService memberService;

//    wx.open.redirect_url=http://localhost:8160/api/ucenter/wx/callback
    @GetMapping("callback")
    public String getMemberInfo(String code,String state){

        System.out.println("code"+code);//code071CS10w3Sdfv03Koq2w3Ajg351CS10p
        System.out.println("state"+state);//stateatguigu

        try {
            //1 获取code值，临时票据，类似于验证码
            //2 拿着code请求 微信固定的地址，得到两个值 accsess_token 和 openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            //拼接三个参数 ：id  秘钥 和 code值
            String accessTokenUrl = String.format(
                    baseAccessTokenUrl,
                    ConstantWxUtil.WX_OPEN_APP_ID,
                    ConstantWxUtil.WX_OPEN_APP_SECRET,
                    code
            );
            //2.模拟客户端发送请求
            //请求这个拼接好的地址，得到返回两个值 accsess_token 和 openid
            //使用httpclient发送请求，得到返回结果
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println(accessTokenInfo);
            /**
             * 返回“json对象”
             *   {"access_token":"67_lH1Ek5ht_XDSm0wBhpxEb36i8OfdLjxIrsdDEWoA0eY0pnwMXLmnL4Ix8oFNhlHLuKzD_06wYomiVTsNXQfF5cTUr1wvxEXAhc4nDfEOtsU",
             *   "expires_in":7200,
             *   "refresh_token":"67_iyZpuCWN_Mu8Ut_ou5-7ZlenCcP7jiMBQ7_gaKxO9cnMq4yfdEEqKhr7mGad_7E1Tu21LEZEJYIUDkAjQDu_tAuSglLAfplFtb7c8SLLFdg",
             *   "openid":"o3_SC57PYuubOTO3xUSmfsqRxuWk",
             *   "scope":"snsapi_login",
             *   "unionid":"oWgGz1IOLbK7FI-kc4nwBdqSUe9I"}
             */
            //获取access_token和openId
            //gson的使用
            Gson gson = new Gson();
            HashMap hashMap = gson.fromJson(accessTokenInfo, HashMap.class);
            String accessToken=(String)hashMap.get("access_token");
            String openId=(String)hashMap.get("openid");

            //数据库中是否存在，不存在，就直接注册,openId是唯一的
            //要是存在，就不用去请求微信提供的地址了
            Member member=memberService.existMember(openId);

            if(member==null){
                //3 拿着得到accsess_token 和 openid，再去请求微信提供固定的地址，获取到扫描人信息
                //访问微信的资源服务器，获取用户信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        accessToken,
                        openId
                );
                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
                //获取返回userinfo字符串扫描人信息
                HashMap userInfoMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String)userInfoMap.get("nickname");//昵称
                String headimgurl = (String)userInfoMap.get("headimgurl");//头像

                System.out.println("nickname="+nickname);//nickname=挽风
                System.out.println("headimgurl="+headimgurl);// headimgurl=https://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTK2QVa1yomApGGGhuJj6PJzMebek7ZAG7tm4eBOLv1JQnAg1hlCML4XPme55VIvUyVrA7lygBYm5g/132

                //注册用户
                member=new Member();
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                member.setOpenid(openId);
                memberService.save(member);
            }

            //使用jwt根据member对象生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            return "redirect:http://localhost:3000?token="+jwtToken;
        } catch (Exception e) {
            e.printStackTrace();
        }

        //最后，返回首页面，通过路径传递token
        return null;

    }


    //生成二维码
    @GetMapping("login")
    public String login(){

        //固定地址，后面拼接参数
//     String url = "https://open.weixin.qq.com/" +
//    "connect/qrconnect?appid="+ ConstantWxUtils.WX_OPEN_APP_ID+"&response_type=code";

        // 微信开放平台授权baseUrl  %s相当于?代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        //对redirect_url进行URLEncoder编码
        String redirectUrl = ConstantWxUtil.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        }catch(Exception e) {
        }

        //设置%s里面值
        String url = String.format(
                baseUrl,
                ConstantWxUtil.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu"
        );

        //重定向到请求微信地址里面
        return "redirect:"+url;
    }


}
